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Friday, July 31, 2020 | History

2 edition of Stock assessment of Arctic grayling in Piledriver Slough during 1996 found in the catalog.

Stock assessment of Arctic grayling in Piledriver Slough during 1996

Douglas F. Fleming

Stock assessment of Arctic grayling in Piledriver Slough during 1996

by Douglas F. Fleming

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  • 23 Currently reading

Published by Alaska Dept. of Fish and Game, Division of Sport Fish, Research and Technical Services in Anchorage .
Written in English

    Subjects:
  • Arctic grayling -- Alaska -- Piledriver Slough -- Statistics.,
  • Fish populations -- Alaska -- Piledriver Slough -- Measurement.,
  • Fish-culture -- Alaska -- Piledriver Slough -- Statistics.

  • About the Edition

    In 1996, a mark-recapture investigation was conducted to assess the stock of Arctic grayling Thymallus arcticus in Piledriver Slough, near Fairbanks, Alaska. The timing of the investigation corresponded with an exceptionally late spring breakup. A total of 808 Arctic grayling were captured with backpack electrofishing gear, marked, and released during late-May. During the late-June recapture sampling, 1,009 Arctic grayling were captured using the same methods and examined for marks, yielding 91 recaptures. An estimated 9,981 (SE = 1,256) Arctic grayling > 150 mm FL were present during late June. The 1996 stock was characterized by a high proportion of young Arctic grayling, and the age composition was predominated by age-3 fish. Significantly fewer Arctic grayling 270 mm FL were present in 1996 than at the last assessment in 1994. Densities of Arctic grayling have continued to remain at high levels (722 fish per km), but beaver dams have blocked migrations to headwater areas and reduced the total area of habitat by as much as 60%.

    Edition Notes

    Statementby Douglas F. Fleming.
    SeriesFishery data series -- 97-18., Fishery data series -- no. 97-18.
    ContributionsAlaska. Division of Sport Fish. Statewide Research and Technical Services Unit.
    Classifications
    LC ClassificationsSH11 .A7542 no.97-18
    The Physical Object
    Paginationii, 22 p. :
    Number of Pages22
    ID Numbers
    Open LibraryOL15482588M

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Stock assessment of Arctic grayling in Piledriver Slough during 1996 by Douglas F. Fleming Download PDF EPUB FB2

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